Valve-grinding tool.



C. L. LATIMER.

VALVE GRINDING TOOL.

APPLICATION men DEC. 12. 1916.

Patented Mar. 13', 191;

7 %l V 23 d 1 I Z0 i 2/ 10" 6 4 Q Z? W ,efi c ,ZQn'/wer @VM r cmfm q CHARLES'L. LATIMER, 016 FORT WADSWORTH, NEW YORK.

VALVE-GRINDING TOOL.

Specification of Letters Patent.

Patented Mar. 13, 1 917.

Application filed December 12, 1916. Serial N 0. 138,482.

To all whom it may concern:

Be it known that I, CHARLES LL- LATI- MER, a citizen of the United States, residing at Fort Wadsworth, in the county of. Richmond, State of New York, have invented certain new and useful Improvements in Valve-Grinding Tools; and 'I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention is an improvement in valve grinding tools and'has particular reference to a tool for grinding valves on their seats.

An object of the invention is to grind valves which are inaccessibly located and }'2I'O\'ll(3l with openings or grooves for re cciving a suitable instrument whereby the valves are turned and in carrying out this object use is made of a valve engaging head having a yieldable centering device carried thereby for on the-valve.

Another objectis the provision of novel means for rotating the valve, said means n chuhng ad ustable bits earned by the valve engaging head and adapted to removabiy engage the openings or grooves in the valve.

A further object is to provide a tool of this; character which is simple in construction, easy to manufacture and effective in carrying out the purpose for which it is designed.

The inventive idea involved is capable of receiving a variety of mechanical expressions, some of which, for the purpose of illustrating the invention, are shown in the awolnpanying drawing, wherein l 'igure 1 is a. side elevation of the tool colistriuztml in accordance with the invention.

Fig. 2 is a vertical central section through the valve engaging head.

Fig. 3 is a bottom plan view of the head.

Fig; 4 is a perspective view of one of the bits employed in connection with the mvention.

Fig. 5 is a view similar to Fig. 2 showing another form of the invention.

Fig. 6 is a bottom plan view of Fig. 5.

The accompanying drawing illustrates what an: believed to be the preferred forms oi the invention and by particular reference properly positioning said head to Figs. 1 to 4. inclusive, it will be seen that invention comprises an operative crank handle 10, the lower end of which is externally screw threaded as indicated at 11 and provided with a longitudinal bore 01' open- 111g 12 for a purpose which will appear in the course of the description.

A valve engaging head 13, preferably in the form of a disk, is provided with a centhe trally located screw threaded socket 14.- for.

center of the valve after which pressure is' brought to bear on the handle and the valve with the valve at which time the centering pin recedes within the bore 12 against the tension of the spring 18. Suitable fastenin means such as the nut 19 may be threadec upon the lower end of the handle 10 and engaged with the adjacent face of the valve engaging head 13 whereby to securely retain the same in position on the handle.

The valve engaging face of thehead 13 is preferably provided with diametrically dis posed recesses 20 having conical bearing surfaces, the, inner ends of said recesses communicating with the openings 21 which communicate with the opposite face of the head 13. Mounted in each of the recesses 20 is an adjustable bit 22 having a beveled surface 23 adapted for engagement 'ith the conical surface of the recess, said bit also having a shank 24 which extends through the opening 21 and has its extremity 25 screw thread ed to receive thereon the fastening nut 26 which has interposed therebetween'and the adjacent face of the head 13 the flexible washers 27 whereby the bit is securely reengaging head brought into contact tained in its adjusted positions. The/valve engaging face of each bit is preferably circular 1n formation and is provided adjacent its peri hery with a projecting lug or pin 28 whic is adapted to engage in one of the openings in the valve after the bit has been adjusted to its proper position. In order to operating handle, a

other form of the invention. which is part icularly adapted for use in connection with valves having rooves therein, instead of openings. In t is instance a bit, generally indicated by the numeral 30, is in the form of a disk 31 having a slot engaging portion 32 extending therefrom and provided with a longitudinal opening 33 for receivinga centering pin 34 which is otherwise mounted in the same manner as previously described. Extending from the edge of the disk 31 at diametrically disposed points are the parallel arms 35 which extendthrough the recesses 20 and openings 21 inthe head 13 and which are screw threaded upon their ends to receive the fastening nuts 36 for securing the bit in position on the head.

What is claimed is 1. A valve grinding tool comprising an valve engaging head carried by said handle, a bit mounted in said head and having a projection for engaging the recess in a valve, and a centering device yieldably mounted in said head.

2. A valve grinding tool comprising an operating handle, a valve engaging head carried by said handle, a bit mounted in said head and having a projection for engaging the recess in a valve, a centering pin mounted in said head and projecting into said handle, and a spring mounted in said handle supporting the same 1n and engaging said pin for yieldably supporting the same in a projected position.

3. A valve grinding tool comprisin an operating handle, a valve engaging ead carried by said handle, and having oppositely disposed substantially conical recesses and openings communicating therewith, an adjustable bit rotatably mounted in each recess and havin a shank extending through the opening which communicates with said recess, means engaging said shank for securing the bit in its adjusted positions, and a prpjection extending fromgach bit for engaging an opening in a val valve grinding tool comprising anoperating handle,

carried by said handle, and having oppositely disposed substantially conical recesses and openings communicating therewith, an adjustable bit rotatably mounted in each recess and having a shank extending through the opening which'communicates with said recess, means engaging said shank for scouring the bit in its adjusted positions, a projection extending from Leach bit for engaging an opening 1n a valve, and a centering device mounted in said head.

5. A valve grinding tool comprising an operating handle, a valve engaging head carried by said handle, a centering pin mounted in said head and projecting into said handle, and a spring mounted in said handle and engaging said pin for yieldably a projected position.

I11 testimony whereof, I aflix my signature, in the presence of two Witnesses.

CHARLES L. LATIMERQ Witnesses:

JAMES C. WADDELL, ANDREW G. Konnsnnsxn.

a valve engaging head 

